Hot-blast stove for heating air, steam, or other gases, and brick therefor.



F. C. ROBERTS. l HOT BLAST sTovE EOE HEATING AIE, STEAM, 0E OTHER GASES,AND BRIGK THEEETOR.

APPLICATION FILED MARJEO, 1912. 1,032,505.,

Patented July 16, 1912. C A

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W/I I WIG. 12

and permanent',

FRANK, C. ROBERTS, OF-WYNNEWOOD, PENNSYLVANIA,

EGT-BLAST STOVE FDR HEATING AIR, STEAM, OR OTHER GASES, AND

Specification of Letters Patent.

BRICK THEREFOR.

Patented July i6, il9l2.

Application tiled March 30, 1912. Serial No. GSTCBM.

cation, taken in connection with the accompan ing drawings.

y invention relates to hot blast stoves of the character used in heatingthe air for blast furnaces and in which fire brick surfaces are arrangedto act as regenerators for absorbing and giving od heat. Theseregenerators are built with tire bricks so ylaid as to form a series ofvertical fines through which the highly heated gases are drawn by thechimney draft; the heat of the gases is, in this process, partlyabsorbed by the brick work. When the brickwork has become, highlyheated, the necessary valves are operated whereby the flow of gases isdiscontinued and air or other medium forced through the fines composingthe regenerator; in this manner the heat absorbed by the brickwork inthe first described process is given 0E to, or absorbed by, the air inthe second described process.

Manifestly the above described processes submit the brickwork toalternate heating and cooling, and consequently to alternate expansionand contraction. Further,.it is well known that thefheated gases intheir passage through the regenerators necessarily carry a considerablequantity of dirt, which if allowed to accumulate in the flues impairsthe heating capacity of the regenerators by reducing the amount of bricksurface brought into contact with the heated gases. As a result, it isessential that thebrickwork of the regenerators be constructed in assolid form as possible in order that the tlues shall maintain'theiroriginal shape and thusprevent the formation of ,projecting surfacesupon which the dirt con take place without materially` affecting theoriginal shape and alineinent of the flues. I attain this object by thedesigns and arrangements of brickwork illustrated in the accompanyingdrawings in which- Figure 1 is a plan of a portion of a regenerator;Figs. 2 and 3 are sections through the regenerator on the planesindicated; Fig. l shows the brick used in the regenerator illustrated inFigs. l, 2 and 3. Fig. 5 is a plan of a portion of a regenerator builtwith bricks of a different design from that shown in Fig. 4; Figs. 6 and7 are sections through this regenerator on the planes indicated; Figs. 8and 9 yshow the shape of the bricks used in the construction illustratedin Figs.v

5, 6 and 7. Fig. l0 is a plan of aportion of a regenerator which may beconstructed by the use alone of the brick shown in Fig. 8; Figs. l1 andl2 are sections through this regenerator on the planes indicated. Fig.13 shows one of the walls of a regenerator constructed with anotherforni of brick.

Similar letters refer to similar parts throughout the several views.

As indicated in the drawings the regenerator fines O are formed by theintersection of two series of parallel walls, the one series P, Q, P,Q., being normal to the other series R, S, It, S.

rllhe individual bricks forn'iing the various constructions illustratedare provided at their two ends with either projections or recesses orboth. The brick used (sce Fig. 4) in the regenerator shown in Fig. l is`p1ovided .with a projection at one end and a recess at the other end.The brick' used in the regenerator shown in Fig. 5 are of two types (seeFigs. 8 and 9); that shown in Fig. 8 has a projection at each end whilethat shown in Fig. 9 has a recess in each end. In constructing theregenerator shown in Fig. l0, a brick with projections at each end isemployed .(see Fig. S).

ln the various designs of brick illustrated the projectionsl andrecesses extend 1n all l located below the top surface or above thelowersurfaee of the brick and that it is not essential that theprojections and recesses be located symmetrically in reference to thecentral axis of the brick which passes lthrough the two ends but thatthe projections and recesses may be arranged as indi-v body of thebrick. Two means are shown to meet this requirement as illustrated inFigs.

4- and 9.

In the construction shown in Figs. 1, 2, 3, 5, G, 7 and 13 the bricksare laid in horizontal courses extending across the regenerator. If itis thought desirable the construction shown in FigssllO, l1 and 12 maybe used wherein, the'horizontal joints between the brick in eachalternate parallel wall of each series occur one haltI course or heightof brick below or above the horizontal joints in the adjacent parallelwalls of the same yseries. Y

Having thus described my invention, what I claim and desire to cover byLetters Patent isi l. In a hot blast stove regenerator, a flue structurecomposed of bricks provided' with projections and recesses in theirtwo`ends the projections and recesses between abut-v of' the bricks, theprojections and recesses in theiry ments extending across the widthhorizontal direction being equal to not greater than Aonehalt thebreadth of the bricks, the projections and abutments of the recesseshaving neither their uppermost nor lowerniost surfaces in the sameplanes as respectively the upper' and lower surfaces of the main bodyotV the brick, and the vertical height of the recesses being greaterthan the combined vertical height of the projections engaging therewith.Y.

2. In a hot blast stove regenerator, interlocking bricks, havingprojections vertically not greater than one half the height of the brickand horizontally not greater than one halt' the thickness of the brick,and recesses vertically greater than the engaging projections, abutmentsfor the recesses, the topmost and bottommost faces of the projectionsand the abutments of the recesses being in planes lower and higherrespectively than the top and bottom faces of the bricks.

3. Interlocking bricks, having projections and recesses at their ends,the vertical height of the recesses being greater than that of theprojections and abutments, for the recesses, the uppermost and lowermostsurfaces of the abut-ments being below and above the uppermostl andlowermost surfaces of the bricks respectively.

4. Interlocking bricks, having at their ends projections considerablylremoved from their upper and lower edges, and recesses correspondinglyremoved and abutments for the recesses, the uppermost and lovermostSurfaces of the abutments being below and 'above the uppermost andlowermost surfaces of the bricks respectively.

5.v Interlocking bricks, havingf at their ends projections equidistantfrom top and bottom of the bricks and recesses equidistant from top andbottom of the bricks whose vertical height is more than the verticalyheight 4of the projections and abutments for the recesses, theuppermost and lowermost surfaces ot the abut-ments being below and abovethe uppermost and lowermost surfaces of the bricks respectively.

G. In a brick, a projection at one end of the brick equal in thicknessto the thickness of the brick, horizontally not greater than half of thethickness of the brick, vertically less than halt the vertical height ofthe bricks, its upper surface being below the 'top surface of tho brickand its lower surface above the lower surface of the brick; at the otherend of the brick abutments forming a recess therebetween correspondingto the projection but greater vertically than the projection, theuppermost and lowerinost surfaces of the abutments being respectivelybelow and above the topy and bottom `Sur faces of the brick.

Signed. at Philadelphia, this 28th day of March 1912.

FRANK C. ROBERTS.

Witnesses I J. DoNALnsoN PAx'roN, RANDOLPH I-I. MILLER.

